The Englishwoman Vicky discovers a corpse in Berlin's Grunewald that looks just like her twin sister. When her mother is murdered in England and Vicky narrowly survives an assassination attempt, she suspects there must be a dark family secret. The search for the truth takes Vicky across Europe and deep into the past. A race against death begins. "The 5th Commandment" is the second crime novel by Nika Lubitsch, who wrote the German Kindle bestseller of 2012, "The 7th Day." With her second e-book, the Berlin author quickly climbed to the top spot on the crime bestseller list.